用PMDCP和Dipy协同萃取稀土离子

研究了用1-苯基-3-甲基-4-二氯乙酰基吡唑酮-5(PMDCP)和2,2′-联吡啶(Dipy)的氯仿溶液协同萃取钢(Ⅲ)、镨(Ⅲ)、钕(Ⅲ)、钆(Ⅲ)、钇(Ⅲ)、镝(Ⅲ)、镱(Ⅲ)和镥(Ⅲ)。用斜率法和固态协萃合物的元素分析确定了镧协萃合物的组成为La(PMDCP)_3·Dipy。计算了其半萃取pH值以及303K时的协萃常数,考查了固态协萃合物的红外、紫外吸收光谱以及热稳定性。     

PMDCP和Phen对镧系离子的协同萃取

本文研究了用1-苯基-3-甲基-4-二氯乙酰基吡唑酮-5(PMDCP)和1.10-菲绕啉(Phen)的氯仿溶液从硝酸介质中对镧(Ⅲ)、钕(Ⅲ)、镝(Ⅲ)和铥(Ⅲ)的协同萃取。用萃取法确定二元萃合物的组成为Ln(PMDCP)_3,协萃合物的组成为Ln(PMDCP)_3·Phen。测定了它们的半萃取pH值和萃合常数。合成了固态镧和镝的协萃合物,并进行了元素分析,研究了红外吸收光谱和热稳定性。     

〈铕(Ⅲ)/HNO_3/HTTA N_(7402)}〉及〈钆(Ⅲ)/HNO_3/HTTA N_(7402)}〉协同萃取的体系

本文报导了HTTA和N_(7402)混合萃取剂萃取铕(Ⅲ)和钆(Ⅲ)的协同效应。分别测定了HTTA与N_(7402)单独萃取,以及HTTA和N_(7402)混合萃取剂协同萃取的最佳条件以及铕(Ⅲ)与钆(Ⅲ)的分离因数,这两个元素的协萃合物为离子缔合物,其稳定性呈现“倒序”现象。以斜率分析法测出协萃合物的组成可能为(R_3NCH_3)~-,[Eu(TTA)_3NO_3]~-及(R_3NCH_3)~+·[Gd(TTA)_3NO_3]~-,讨论了协萃体系的机理。     

1—苯基—3—甲基—4—苯甲酰基吡唑酮—5与邻二氮菲对稀土Eu(Ⅲ)的协同萃取

本文研究了1—苯基—3—甲基—4—苯甲酰基吡唑酮—5(简称PMBP)与邻二氮菲对Eu(Ⅲ)的协同萃取。实验证明,邻二氮菲对PMBP萃取稀土Eu(Ⅲ)有很强的协萃作用。用浓比递变法及斜率法确定,在本实验条件下,协萃合物组成为EuA_3·B。计算得出Eu(Ⅲ)/HClO_4,NaAc(μ=0.2)/PMBP-C_6H_6体系的logKex=-4.83±0.08。Eu(Ⅲ)/HClO_4,NaAc(μ=0.2)/PMBP-Phen-C_6H_6体系的协萃平衡常数logKs.e.=3.36±0.25。并得出有机相协萃合物生成平衡常数β_3·1=8.19±033。     

4,4′—壬二酰基—双(1—苯基—3—甲基—5—吡唑酮)与磷酸三丁酯对铀(Ⅵ)的协同萃取的研究

研究了4,4′-壬二酰基-双(1-苯基-3-甲基-5-吡唑酮)(H_2A)与磷酸三丁酯(TBP)对铀(Ⅵ)的协同萃取行为,用斜率法测定了协萃合物的组成为UO_2A·TBP,求得协萃平衡常数logK_(se)为1.49,推测了协萃合物的可能结构。     

不对称亚砜萃取和S-烷基异硫脲盐反萃金(Ⅲ)的研究

研究了用正-丁基辛基亚砜萃取、S-丁基异硫脲盐反萃金(Ⅲ)的行为.实验结果表明萃合物的组成为H_3O(n-BOSO)_3AuCl_4,反萃金(Ⅲ)是离子交换机理,金(Ⅲ)萃合物用元素分析、热分析、摩尔电导、UV和IR光谱进行了表征。     

三烷基胺和磷酸三丁酯于盐酸介质中协同萃取铼(Ⅶ)研究

研究了三烷基胺(N235)和磷酸三丁酯(TBP)从盐酸介质中对铼的协同萃取．N235和TBP的浓度比为1∶9时混合萃取体系对Re(Ⅶ)具有较大的协萃作用,最大协萃因子为4.71,对Mo(Ⅵ)的协萃因子为2.16．在pH=1时,萃合物的组成为(R3NH+Cl－)2·HReO4·B,当酸浓度为3 mol·L-1时,萃合物的组成为(R3NH+Cl－)·HReO4·B,而N235单独萃取时萃合物的组成为R3NH+ReO-4．同时证明了混合萃取剂分离钼和铼的协萃效果和萃取能力．     

螯合—中性萃取剂对铀(Ⅳ)的协同萃取

本文研究了1-苯基-3-甲基-4-苯甲酰基吡唑酮(PMBP)与中性萃取剂三辛基氧磷(TOPO)和二辛基亚砜(DOSO)的氯仿溶液从盐酸介质中对铀(Ⅳ)的萃取,发现均有协同效应存在。测定了协萃铬合物的组成为UA_3Cl·B(其中B为TOPO或DOSO)。采用线性回归分析方法分别计算了上述萃合物的协萃平衡常数,其数值为2.7×10~(10)和6.2×10~8。     

1-苯基-3-甲基-4-三氟乙酰基吡唑酮-(5)与Nd(III),Eu(III),Yb(III)的萃取平衡及络合物的合成和性质

在30℃及0.5mol·L(-1)NaNO_6条件下,测定了Nd(III),Eu(III),Yb((III)与1-苯基-3-甲基-4-三氟乙酰基吡唑酮-(5)(PMTFP)氯仿溶液体系的萃取平衡常数及萃合物的组成。用萃取法合成了Nd(III),Eu(III),Yb(III)与PMTFP的固体络合物,分析了它的组成,并通过它们的红外光谱和紫外光谱,探讨了络合物的结构。     

镧系离子(Nd~(3 )、Ho~(3 )、Er~(3 ))与HPMTFP和Dipy三元配合物的研究

对 Ln~(3 )(Nd~(3 )、Ho~(3 )、Er~(3 ))-1-苯基-3-甲基-4-三氟乙酰基吡唑酮-5(HPMTFP)-2,2′-联吡啶(Dipy)体系乙醇一水溶液的光度法研完及其对固态钕三元配合物的元素分析和热重分析证实:三元配合物的组成为 Nd(PMTFP)_3Dipy·H_2O.考查了三元配合物的红外、紫外吸收光谱及溶解性.     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

Characterization of Ordovician carbonate reservoirs, southeastern Saskatchewan, Canada

The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3～4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰～ -7.8‰, PDB) and matrix dolomites (-6.6‰～ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084～0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078～0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

A computer generator for randomly layered structures

AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…     

An Index mechanism for multi-scale view in spatial databases

There are numerous geometric objects stored in the spatial databases. An importance function in a spatial database is that users can browse the geometric objects as a map efficiently. Thus the spatial database should display the geometric objects users concern about swiftly onto the display window. This process includes two operations:retrieve data from database and then draw them onto screen. Accordingly, to improve the efficiency, we should try to reduce time of both retrieving object and displaying them. The former can be achieved with the aid of spatial index such as R-tree, the latter require to simplify the objects. Simplification means that objects are shown with sufficient but not with unnecessary detail which depend on the scale of browse. So the major problem is how to retrieve data at different detail level efficiently. This paper introduces the implementation of a multi-scale index in the spatial database SISP (Spatial Information Shared Platform) which is generalized from R-tree. The difference between the generalization and the R-tree lies on two facets: One is that every node and geometric object in the generalization is assigned with a importance value which denote the importance of them, and every vertex in the objects are assigned with a importance value,too. The importance value can be use to decide which data should be retrieve from disk in a query. The other difference is that geometric objects in the generalization are divided into one or more sub-blocks, and vertexes are total ordered by their importance value. With the help of the generalized R-tree, one can easily retrieve data at different detail levels.Some experiments are performed on real-life data to evaluate the performance of solutions that separately use normal spatial index and multi-scale spatial index. The results show that the solution using multi-scale index in SISP is satisfying.     

Jane Eyre——A Feminist In The 19th Century

In the 19th century the society was controlled by men, and women were just appendants of them, they had not any rights and freedom. But Jane was an exception, she showed some characteristics of early feminist. Jane showed her characteristics of feminism in three aspects: rebellion, equality, and independence. These characteristics were helpful to her success, and feminism is the only way out for women of that time.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-